"There is nothing on the schedule at this time", White House spokeswoman Lindsay Walters told The Hill and USA Today. The seat opened up after Republican Jeff Sessions was tapped as USA attorney general.

In the new ad, an announcer says Moore is being hit by "false allegations" in a "scheme by liberal elites and the Republican establishment" to sink his candidacy for U.S. Senate.

Trump has repeatedly slammed Moore's Democratic opponent, Doug Jones, calling him weak on crime and saying that Jones would not vote for a tax overhaul plan being debated in Congress.

"There is no evidence Roy Moore committed sexual harassment against any of the woman (sic) that have made these accusations or that Roy Moore is a sexual predator", a news release with the headline "Political Prisoner Matt Hale endorses Moore" states. Moore had enjoyed a comfortable lead over Jones until allegations surfaced the former Alabama Chief Justice had improper sexual contact with teenage girls in the 1970s.

The official was not authorized to discuss the president's plans publicly and spoke to The Associated Press on Monday on condition of anonymity.

Trump followed that up with tweets over the weekend saying that Jones would be a puppet of Washington Democrats if elected.

The Peoria Republican was asked about Moore during his stop at last week's McLean County Republican Party breakfast. "And, he's got my opponents in D.C. scrambling", Moore wrote in a fundraising email.

Trump's words could be a boost to the Moore camp, since Democrats' hopes in the race partly depend upon peeling away Republican support from Moore in the deeply red state. He's denied the allegations.

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